M Indicator Does Not Come On Even When the Paddle Shifter (Upshift Switch) or Paddle Shifter (Downshift Switch) Is Operated

M indicator does not come on even when the paddle shifter + (upshift switch) or paddle shifter - (downshift switch) is operated in sequential sportshift mode

Diagnostic Procedure:

1. F-CAN communication line error

2. Gauge control module defective

3. PCM defective

Also check for:

- Check the F-CAN communication line for a DTC. F-CAN Circuit Troubleshooting
- Check the F-CAN communication line by using the gauge control module self-diagnostic function. Reading and Clearing Diagnostic Trouble Codes
- Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function. Reading and Clearing Diagnostic Trouble Codes